CN105119654A - Blue light underwater sensing system based on visible light communication - Google Patents
Blue light underwater sensing system based on visible light communication Download PDFInfo
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- CN105119654A CN105119654A CN201510532932.5A CN201510532932A CN105119654A CN 105119654 A CN105119654 A CN 105119654A CN 201510532932 A CN201510532932 A CN 201510532932A CN 105119654 A CN105119654 A CN 105119654A
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Abstract
The invention discloses a blue light underwater sensing system based on visible light communication, belonging to the technical field of communication. The system comprises a transmitting end and a receiving end; at the transmitting end, an MSP430 single chip microcomputer and a DS18B20 temperature sensor are used for acquiring underwater temperature information, and the acquired information is loaded to an LED drive module through an I/O port of the MSP430 single chip microcomputer; a wafer 1W blue light LED is used as a light source, the visible light communication technology and the sensor technology are combined together, various underwater visible light sensor nodes are designed, an underwater sensing network prototype system based on blue light LED is established through visible light wireless links, and underwater short-distance, high-speed and high-capacity data transmission is realized; at the receiving end, an integrated miniature receiving circuit is used, an S6968 photoelectric detector is used for detecting weak optical signals, the information received by the receiving end is transmitted to a database of a PC, networking is carried out, and thus, underwater temperature can be known constantly.
Description
Technical field
The present invention relates to a kind of blue light underwater sensing system based on visible light communication transmitting the information that submarine temperatures transducer gathers with blue light communication, belong to communication technical field.
Background technology
Visible light communication technology, that the high speed light and shade flash signal be invisible to the naked eye utilizing fluorescent lamp or light-emitting diode etc. to send carrys out transmission information, especially under indoor scene, visible light communication is just towards the direction development of illumination communicating integral, this technology not only energy-saving and environment friendly, do not take frequency spectrum resource, and any radiation injury can not be produced to people.
Radio communication, always as a kind of important means of communication, plays very important effect in modern communications field.Traditional communication needs to take frequency spectrum resource day by day in short supply, and transmission rate is limited, and there is electromagnetic interference, there is the problems such as potential safety hazard in transmission.But the develop rapidly of optical communication and Primary Component thereof makes visible light communication become the focus of whole world research, visible light communication technology and USB interface technology is combined, can realize the high-speed transfer of large capacity digital signal.
Because visible light communication technology has a good application prospect, in the communications field in future, there is consequence and value, be subject to the attention of a lot of research institution and Telecom Operators, the country such as Japan, Europe, the U.S. has also dropped into a large amount of human and material resources, financial resources to the research of visible light communication all the time.At present, the main application scenarios of visible light communication is: indoor mobile communication, under water visible light communication, traffic lights communication, visible ray location etc.
At present, the domestic research to visible light communication under water mainly concentrates in the research of channel simulator under water and Point-to-Point Communication System under water, does not almost have about the research utilizing visible light communication technology to set up underwater sensor network.21 century is century of ocean, and along with the appearance of various underwater transducer, traditional underwater sound communication cannot meet the growing bandwidth demand of undersea detection.Though bluish-green laser communication under water can realize underwater high-speed, large-capacity data transmission, high cost and the technology of complexity make it be difficult to realize large-scale application.Therefore, in the urgent need to carrying out the research of novel wireless communication technology under water.Along with improving constantly of LED component manufacturing process and material technology, at present, commercial blue-ray LED not only has high light extraction efficiency, and has relatively high modulation bandwidth, and this provides feasibility on physical device for it realizes underwater high-speed communication.
Summary of the invention
The technical problem that the present invention solves is: propose a kind of easy to operate, underwater sensing system based on visible light communication that system architecture is flexible and changeable.
In order to solve the problems of the technologies described above, the technical scheme that the present invention proposes is: a kind of blue light underwater sensing system based on visible light communication, comprise transmitting terminal and mobile reception end, described transmitting terminal is blue-ray LED, submarine temperatures information is gathered under water by DS18B20 temperature sensor, by blue light communicating information, described receiving terminal uses photoelectricity to connect survey device and receives information and carry out small-sized encapsulated.
Preferably, described temperature sensing information is communicated by blue light and transmits under water.
Preferably, described transmitting terminal uses MSP430 single-chip microcomputer, design transducer collecting temperature program, and uses lithium battery to power in encapsulation box simultaneously.
Preferably, output pin P3.4 is decided to be information output pin by described transmitting terminal, information is loaded on LED drive circuit.
Preferably, light radiating portion is the important component part of visible light communication, and light source and drive circuit two parts composition, described system realizes the amplification of light signal by 74HC14, the input signal slowly changed can be converted to output signal that is clear, non-jitter.
Preferably, the Transistor-Transistor Logic level changed by CH340, the energy carrying out signal through two not gates of 74HC14 amplifies, and drive the LED of rear class to send light signal, power unit has added two electric capacity and has been coupled, and removes Noise and Interference.
Preferably, the receiving terminal of described system adopts integrated micro receiving circuit, and adopt S6968 photoelectric detector to realize Feebleness Light Signal Examining, the information transmission received by receiving terminal, on the database of PC, is networked, and is convenient to moment understanding submarine temperatures.
Preferably, what receiving terminal rs 232 serial interface signal turned serial bus module employing is traditional USB interface technology, for receiving the serial bus signal that the digital devices such as exterior PC produce, transfer to signal processing module, this serial bus signal is differential signal, usual visible light communication signal transmission is single-ended signal, therefore intends adopting FT232 chip to realize mutually changing between differential signal and single-ended signal, and the signal after conversion adopts the process such as amplification, filtering, modulation.
Beneficial effect: the present invention compared with prior art, has the following advantages:
LED-based visible light communication technical research is more and more subject to people's attention, and this has benefited from the commercialization of high performance lED.Visible light communication (VisibleLightCommunication, being called for short VLC) technology is a kind of Wideband wireless access technology, the naked eyes high speed scintillation signal inconspicuous that it is sent by high performance light-emitting diode carrys out transmission information, and can be caught by devices such as photodetectors and detect, it can realize the transmission of data while providing illumination.LED has that power consumption is little, high brightness, high frequency sound and the advantage such as the life-span is long, can meet the requirement as visible light communication transport vehicle.Underwater sensing systems technology information capacity based on visible light communication is large, it is flexible, safe and secret to dispose, and not by the impact of Electromagnetic Interference, and can reduce the problems such as electromagnetic wave coverage hole.Compare with underwater sound communication with underwater electromagnetic wave communication, to overcome electromagnetic wave attenuation serious for visible light communication under water, the shortcomings such as underwater sound communication narrow bandwidth, time delay be large, the impact that is subject to marine environment.Visible wavelength range is 380nm-780nm, and the ultra-wide spectrum frequency range that can provide is about 375THz (1THz=1000GHz), for foundation stone has been established in Large Volume Data communication.Because wavelength is shorter, required transmitting antenna and reception antenna shorter, equipment cost is low, and be convenient to mini-plant carrying.In addition, visible light communication has that detection accuracy is high, good directionality under water, is easy to the feature such as secret.
Visible light communication technology combines with sensor technology by the present invention, designs the multiple node of visible light sensor under water, utilizes visible ray wireless link, adopt star-like networking mode, builds the underwater sensing net prototype system based on blue-ray LED.
Blue light subsurface communication based on visible light communication technology possesses the advantage of the high speed of bluish-green laser communication under water, large-capacity data transmission, compensate for the deficiency that underwater sound communication speed is slow, time delay is large.Secondly, for adopting the transceiver of visible light communication technology not need strict aligning, a difficult problem for underwater laser communication high directivity is overcome.Again, to visible light communication technology be combined with sensor technology under water, the optical sensor of two-forty, low cost, small size can be produced, thus build respective sensor network, the information such as Real-time Collection submarine temperatures, salinity, image, sound, by disposing a large amount of optical sensor node, realize the real-time monitoring to specified sea areas.
Accompanying drawing explanation
Be described further of the present invention below in conjunction with accompanying drawing.
Fig. 1 is the blue light underwater sensing system fundamental block diagram based on visible light communication
Fig. 2 is the blue light underwater sensing system schematic based on visible light communication
Embodiment
Embodiment 1
Below in conjunction with embodiment and Figure of description, technical scheme of the present invention is described in further detail:
A kind of blue light underwater sensing system based on visible light communication, comprise transmitting terminal and mobile reception end, described transmitting terminal is blue-ray LED, submarine temperatures information is gathered under water by DS18B20 temperature sensor, by blue light communicating information, described receiving terminal uses photoelectricity to connect survey device and receives information and carry out small-sized encapsulated.
Described temperature sensing information is communicated by blue light and transmits under water.
Described transmitting terminal uses MSP430 single-chip microcomputer, design transducer collecting temperature program, and uses lithium battery to power in encapsulation box simultaneously, and output pin P3.4 is decided to be information output pin, information is loaded on LED drive circuit.
Visible light communication technology combines with sensor technology by said system, designs the multiple node of visible light sensor under water, utilizes visible ray wireless link, adopt star-like networking mode, builds the underwater sensing net prototype system based on blue-ray LED.
Light radiating portion is the important component part of visible light communication, and light source and drive circuit two parts composition, described system realizes the amplification of light signal by 74HC14, the input signal slowly changed can be converted to output signal that is clear, non-jitter.
The Transistor-Transistor Logic level changed by CH340, the energy carrying out signal through two not gates of 74HC14 amplifies, and drive the LED of rear class to send light signal, power unit has added two electric capacity and has been coupled, and removes Noise and Interference.
The receiving terminal of described system adopts integrated micro receiving circuit, and adopt S6968 photoelectric detector to realize Feebleness Light Signal Examining, the information transmission received by receiving terminal, on the database of PC, is networked, and is convenient to moment understanding submarine temperatures.
What receiving terminal rs 232 serial interface signal turned serial bus module employing is traditional USB interface technology, for receiving the serial bus signal that the digital devices such as exterior PC produce, transfer to signal processing module, this serial bus signal is differential signal, usual visible light communication signal transmission is single-ended signal, therefore intend adopting FT232 chip to realize mutually changing between differential signal and single-ended signal, the signal after conversion adopts the process such as amplification, filtering, modulation.
Embodiment 2
As shown in Figure 2, based on the blue light underwater sensing system schematic of visible light communication, this overall system comprises transmitting terminal and receiving terminal.
Transmitting terminal comprises temperature collect module and LED drive module, temperature collect module comprises MSP430 single-chip microcomputer and DS18B20 temperature sensor gathers submarine temperatures information, what temperature sensor was selected is unibus structure, high accuracy, low-power consumption DS18B20 temperature sensor, this sensor periphery circuit is fairly simple, utilize single-chip microcomputer I/O port can realize the control of DS18B20 temperature sensor and the reading of temperature, conveniently operate.
LED drive module adopts Schmidt trigger to drive, system realizes the amplification of light signal by 74HC14,74HC14 is a high-speed cmos device, its pin compatibility low-power consumption Schottky TTL (LSTTL) series, be a 6 tunnel schmidt trigger inverters, the input signal slowly changed can be converted to output signal that is clear, non-jitter.
This test light source adopts the blue-ray LED of 1W, the high modulation bandwidth of LED is the prerequisite realizing high speed information transmission, by vector network analyzer (AgilentE5072A), the three dB bandwidth recording this wafer 1W blue-ray LED is about 5.8MHz, and therefore this blue-ray LED meets the modulation bandwidth of visible ray high-speed communication under water demand.
At receiving terminal, the performance quality of receiving circuit is the concentrated expression of whole visible light communication system performance.Receiving circuit mainly comprises the selection of photodetector, pre-amplification circuit, the design of negative voltage power supply circuit and comparator circuit, these parts together constitute the linear passageway of optical receiving end, complete the conversion of light/electricity successively, signal amplifies judgement reduction process to obtain signal level needed for decision circuit and last signal.
Optical signal receiving module is intended adopting S6968 photoelectric detector to realize Feebleness Light Signal Examining.Signal processing module adopts and suitablely realizes signal conversion across process such as resistance amplifying circuit, AGC automatic gain control circuit, bandpass filtering, demodulation etc., carries out signal decision simultaneously, and signal decision arranges suitable decision threshold and realizes signal and correctly reduce.And output information is turned serial bus module through rs 232 serial interface signal, by the information transmission that finally obtains on the database of PC, network, being convenient to the moment understands submarine temperatures.
In visible light communication, along with the increase of transmission range, the signal that receiving terminal receives is more and more fainter, and signal to noise ratio is lower, and the difficulty for subsequent conditioning circuit process is also larger.Therefore, for the detection of getting over weak signal, the effect that enlarge leadingly plays is most important.The design have selected NE5532 to carry out the amplification to the small-signal received.Afterwards or integrated transporting discharging must be used and a low pass voltage follow filter carries out secondary amplification and High frequency filter to signal, square-wave signal is clearly obtained again by a LM311P voltage comparator chip, for amplification and the judgement of 7414 chips, finally by FT232 chip, rs 232 serial interface signal is turned serial bus signal and transfer to PC end.
The concrete technical scheme be not limited to described in above-described embodiment of the present invention, all employings are equal to replaces the protection range that the technical scheme formed is application claims.
Claims (8)
1. the blue light underwater sensing system based on visible light communication, comprise transmitting terminal and mobile reception end, it is characterized in that, described transmitting terminal is blue-ray LED, submarine temperatures information is gathered under water by DS18B20 temperature sensor, by blue light communicating information, described receiving terminal uses photoelectricity to connect survey device and receives information and carry out small-sized encapsulated.
2. according to claim 1 based on the blue light underwater sensing system of visible light communication, it is characterized in that, described temperature sensing information is communicated by blue light and transmits under water.
3. the blue light underwater sensing system based on visible light communication according to claims 1, is characterized in that, described transmitting terminal uses MSP430 single-chip microcomputer, design transducer collecting temperature program, and uses lithium battery to power in encapsulation box simultaneously.
4. the blue light underwater sensing system based on visible light communication according to claims 3, it is characterized in that, output pin P3.4 is decided to be information output pin by described transmitting terminal, information is loaded on LED drive circuit.
5. the blue light underwater sensing system based on visible light communication according to claims 1 or 2, it is characterized in that, light radiating portion is the important component part of visible light communication, light source and drive circuit two parts composition, described system realizes the amplification of light signal by 74HC14, the input signal slowly changed can be converted to output signal that is clear, non-jitter.
6. the blue light underwater sensing system based on visible light communication according to claims 1 or 2, it is characterized in that, the Transistor-Transistor Logic level changed by CH340, the energy carrying out signal through two not gates of 74HC14 amplifies, the LED of rear class is driven to send light signal, power unit has added two electric capacity and has been coupled, and removes Noise and Interference.
7. the blue light underwater sensing system based on visible light communication according to claims 1 or 2, it is characterized in that, the receiving terminal of described system adopts integrated micro receiving circuit, S6968 photoelectric detector is adopted to realize Feebleness Light Signal Examining, the information transmission received by receiving terminal is on the database of PC, network, be convenient to moment understanding submarine temperatures.
8. the blue light underwater sensing system based on visible light communication according to claims 1 or 2, it is characterized in that, what receiving terminal rs 232 serial interface signal turned serial bus module employing is traditional USB interface technology, for receiving the serial bus signal that the digital devices such as exterior PC produce, transfer to signal processing module, this serial bus signal is differential signal, usual visible light communication signal transmission is single-ended signal, therefore intend adopting FT232 chip to realize mutually changing between differential signal and single-ended signal, the signal after conversion adopts the process such as amplification, filtering, modulation.
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| CN105450301A (en) * | 2015-12-23 | 2016-03-30 | 安阳工学院 | Short-distance LED (Light-Emitting Diode) visible light transmission device |
| CN105515680A (en) * | 2016-01-08 | 2016-04-20 | 暨南大学 | Underwater IOT (Internet Of Things) system of VLC (Visible Light Communication) based on blue LEDs (Light Emitting Diodes) |
| CN105680941A (en) * | 2016-02-26 | 2016-06-15 | 中国科学技术大学 | Underwater LED (Light-Emitting Diode) long distance communication system based on visible light |
| CN105790838A (en) * | 2016-03-24 | 2016-07-20 | 北京邮电大学 | Water-land optical communication network architecture and communication method based on interconnection between underwater visible light communication network units (UVNU) and fiber |
| CN105826157A (en) * | 2016-05-20 | 2016-08-03 | 中国人民解放军信息工程大学 | Underwater visible light communication receiving detection method, underwater visible light communication receiving detection device and underwater visible light communication system |
| CN107104734A (en) * | 2017-05-24 | 2017-08-29 | 西安邮电大学 | Light transmitting and receiving system visible under water based on bluish-green laser |
| CN107872278A (en) * | 2017-09-13 | 2018-04-03 | 南京邮电大学 | A kind of underwater visible light communication sensor network system of multidimensional based on ranging localization |
| CN109194406A (en) * | 2018-08-08 | 2019-01-11 | 西安理工大学 | A kind of underwater portable formula radio optical communication system and communication means |
| CN109361474A (en) * | 2018-11-23 | 2019-02-19 | 中国船舶重工集团公司第七0五研究所 | A kind of double mode underwater wireless optical communication method |
| CN110086536A (en) * | 2019-04-29 | 2019-08-02 | 格利尔数码科技股份有限公司 | Intelligent perception system based on LED visible light communication |
| CN112235049A (en) * | 2019-06-28 | 2021-01-15 | Oppo广东移动通信有限公司 | Communication system and method for diving, shipborne communicator and diving communicator |
| CN114337818A (en) * | 2022-01-05 | 2022-04-12 | 南京邮电大学 | Visible light digital audio communication device |
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| CN105450301A (en) * | 2015-12-23 | 2016-03-30 | 安阳工学院 | Short-distance LED (Light-Emitting Diode) visible light transmission device |
| CN105515680A (en) * | 2016-01-08 | 2016-04-20 | 暨南大学 | Underwater IOT (Internet Of Things) system of VLC (Visible Light Communication) based on blue LEDs (Light Emitting Diodes) |
| CN105515680B (en) * | 2016-01-08 | 2018-07-31 | 暨南大学 | Underwater Internet of things system based on blue-ray LED visible light communication |
| CN105680941B (en) * | 2016-02-26 | 2018-04-10 | 中国科学技术大学 | A kind of underwater LED long haul communications systems based on visible ray |
| CN105680941A (en) * | 2016-02-26 | 2016-06-15 | 中国科学技术大学 | Underwater LED (Light-Emitting Diode) long distance communication system based on visible light |
| CN105790838A (en) * | 2016-03-24 | 2016-07-20 | 北京邮电大学 | Water-land optical communication network architecture and communication method based on interconnection between underwater visible light communication network units (UVNU) and fiber |
| CN105790838B (en) * | 2016-03-24 | 2018-07-17 | 北京邮电大学 | A kind of optical fiber/visible light land and water heterogeneous network framework and communication means |
| CN105826157A (en) * | 2016-05-20 | 2016-08-03 | 中国人民解放军信息工程大学 | Underwater visible light communication receiving detection method, underwater visible light communication receiving detection device and underwater visible light communication system |
| CN105826157B (en) * | 2016-05-20 | 2017-12-12 | 中国人民解放军信息工程大学 | Underwater visible light communication receives detection method, apparatus and system |
| CN107104734A (en) * | 2017-05-24 | 2017-08-29 | 西安邮电大学 | Light transmitting and receiving system visible under water based on bluish-green laser |
| CN107872278A (en) * | 2017-09-13 | 2018-04-03 | 南京邮电大学 | A kind of underwater visible light communication sensor network system of multidimensional based on ranging localization |
| CN109194406A (en) * | 2018-08-08 | 2019-01-11 | 西安理工大学 | A kind of underwater portable formula radio optical communication system and communication means |
| CN109361474A (en) * | 2018-11-23 | 2019-02-19 | 中国船舶重工集团公司第七0五研究所 | A kind of double mode underwater wireless optical communication method |
| CN110086536A (en) * | 2019-04-29 | 2019-08-02 | 格利尔数码科技股份有限公司 | Intelligent perception system based on LED visible light communication |
| CN112235049A (en) * | 2019-06-28 | 2021-01-15 | Oppo广东移动通信有限公司 | Communication system and method for diving, shipborne communicator and diving communicator |
| CN114337818A (en) * | 2022-01-05 | 2022-04-12 | 南京邮电大学 | Visible light digital audio communication device |
| CN114337818B (en) * | 2022-01-05 | 2023-09-08 | 南京邮电大学 | Visible light digital audio communication device |
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